1
GATE ECE 2003
MCQ (Single Correct Answer)
+1
-0.3
Figure shows the Nyquist plot of the open-loop transfer function G(s)H(s) of a system. If G(s)H(s) has one right hand pole, the closed loop system is GATE ECE 2003 Control Systems - Frequency Response Analysis Question 61 English
A
always stable
B
unstable with one closed-loop right hand pole
C
unstable with two closed-loop right hand poles
D
unstable with three closed-loop right hand poles
2
GATE ECE 2003
MCQ (Single Correct Answer)
+1
-0.3
The gain margin for the system with open-loop transfer function G(s)H(s)=$${{2(1 + s)} \over {{s^2}}}$$ is
A
$$\infty $$
B
0
C
1
D
$$ - \infty $$
3
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
The approximate Bode magnitude plot of a minimum-phase system is shown in figure. The transfer function of the system is GATE ECE 2003 Control Systems - Frequency Response Analysis Question 35 English
A
$${10^8}{{{{\left( {s + 0.1} \right)}^3}} \over {{{\left( {s + 10} \right)}^2}\left( {s + 100} \right)}}$$
B
$${10^7}{{{{\left( {s + 0.1} \right)}^3}} \over {{{\left( {s + 10} \right)}}\left( {s + 100} \right)}}$$
C
$${10^8}{{{{\left( {s + 0.1} \right)}^2}} \over {{{\left( {s + 10} \right)}^2}\left( {s + 100} \right)}}$$
D
$${10^9}{{{{\left( {s + 0.1} \right)}^3}} \over {\left( {s + 10} \right){{\left( {s + 100} \right)}^2}}}$$
4
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
The gain margin and the phase margin of a feedback system with G(s)H(s)=$${s \over {{{\left( {s + 100} \right)}^3}}}$$ are
A
0 dB, $${0^0}$$
B
$$\infty ,\infty $$
C
$$\infty ,{0^0}$$
D
88.5 dB, $$\infty $$
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